Re: Sample Resource Specifications for Substrate Components

On Fri, Apr 18, 2008 at 07:38:05AM -0400, John Jacob wrote:
> Patrick, Ted and Rob
>
> It is not clear to me that these resources can be sliced? Is this
> something that needs to be identified in the Rspec? As presented in
> these examples, it seems like the two machine types do not support
> simultaneous, isolated slices. Is this true? How might an Rspec differ
> for the case of simultaneously shared resources?

Patrick or Rob will correct me if I say something bogus, but the intent
is that resources described by an RSpec are intended to be slicable.

Maybe the issue is that there's no indication of how thickly the
resources can be sliced?  That does seem like the kind of thing one
would like to communicate in an advertisement, and that one would
consider in picking which components to try to instantiate on.

Rob, does that sound like something we need to add?  I'm worried that
there's a pretty big can of worms under there (there are lots of ways to
slice).  Do you think there's a simple, general slicing granularity
metric that we can communicate?

I'm tempted to say that for each resource there's a granularity
parameter (2.5 GHz of CPU in 500 MHz slices).  That certainly may get
more complex for connectivity.

John, is that the issue you're getting at or did I miss it.

--
Ted Faber
http://www.isi.edu/~faber           PGP: http://www.isi.edu/~faber/pubkeys.asc
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